Speaker



FIG. 1 is a front elevational view of a speaker showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top, front and right side perspective view thereof.

The broken lines in the figures illustrate portions of the speaker which form no part of the claimed design. 

CLAIM The ornamental design for a speaker, as shown and described. 